IB/qib: Convert opcode counters to per-context

This fix changes the opcode relative counters for receive to per
context.

Profiling has shown that when mulitple contexts are being used there
is a lot of cache activity associated with these counters.

The code formerly kept these counters per port, but only provided the
interface to read per HCA.  This patch converts the read of counters
to per HCA and adds the debugfs hooks to be able to read the file as a
sequence of opcodes.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/infiniband/hw/qib/qib_verbs.c b/drivers/infiniband/hw/qib/qib_verbs.c
index 904c384aa361..092b0bb1bb78 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.c
+++ b/drivers/infiniband/hw/qib/qib_verbs.c
@@ -645,9 +645,11 @@ void qib_ib_rcv(struct qib_ctxtdata *rcd, void *rhdr, void *data, u32 tlen)
         } else
                 goto drop;
 
-        opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
-        ibp->opstats[opcode & 0x7f].n_bytes += tlen;
-        ibp->opstats[opcode & 0x7f].n_packets++;
+        opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0x7f;
+#ifdef CONFIG_DEBUG_FS
+        rcd->opstats->stats[opcode].n_bytes += tlen;
+        rcd->opstats->stats[opcode].n_packets++;
+#endif
 
         /* Get the destination QP number. */
         qp_num = be32_to_cpu(ohdr->bth[1]) & QIB_QPN_MASK;